Ma'anar ƙamus na kalmar "spermicide" ko "spermatocide" wani sinadari ne ko sinadarai da ake amfani da su don kashe ko hana maniyyi, yawanci a matsayin nau'i na maganin hana haihuwa don hana ciki. Wadannan jami'ai suna aiki ta hanyar rushe aikin al'ada na ƙwayoyin maniyyi, wanda ke hana su takin kwai. Ana amfani da maniyyi tare da sauran hanyoyin hana haihuwa, kamar kwaroron roba, diaphragms, ko hular mahaifa, don ƙara tasirin su.